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Signs that youre not getting enough B12: Fatigue Weakness Confusion Memory issues Headaches Depression Pale skin Pain and swelling in the mouth or tongue Erectile dysfunction Vitamin B12 Benefits B12 is linked to several important functions in the body, including: Red blood cell formation Your body needs B12 to produce healthy red blood cells

There are studies to confirm that sublingual B12 supplementation is equally, if not more effective than intramuscular administration for correcting a B12 deficiency

The most common side effect of B12 injections is discomfort at the injection site

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